public static void ApplyTransformationToWidgetsGroupObb(Widget sceneWidget, IList <Widget> widgetsInParentSpace,
Vector2?overridePivotInSceneSpace, bool obbInFirstWidgetSpace,
Vector2 currentMousePosInSceneSpace, Vector2 previousMousePosSceneSpace,
bool convertScaleToSize, CalculateTransformationDelegate onCalculateTransformation)
{
if (widgetsInParentSpace.Count == 0)
{
return;
}
Matrix32d fromSceneToParentSpace = widgetsInParentSpace[0].ParentWidget
.CalcEffectiveTransformToTopWidgetDouble(sceneWidget).CalcInversed();
ApplyTransformationToWidgetsGroupObb(
widgetsInParentSpace,
overridePivotInSceneSpace == null
? (Vector2d?)null
: ((Vector2d)overridePivotInSceneSpace.Value * fromSceneToParentSpace),
obbInFirstWidgetSpace,
(Vector2d)currentMousePosInSceneSpace * fromSceneToParentSpace,
(Vector2d)previousMousePosSceneSpace * fromSceneToParentSpace,
convertScaleToSize, onCalculateTransformation);
}
public static void ApplyTransformationToWidgetsGroupObb(IList <Widget> widgetsInParentSpace,
Vector2d?overridePivotInParentSpace, bool obbInFirstWidgetSpace,
Vector2d currentMousePosInParentSpace, Vector2d previousMousePosInParentSpace,
bool convertScaleToSize, CalculateTransformationDelegate onCalculateTransformation)
{
if (widgetsInParentSpace.Count == 0)
{
return;
}
// Importent. Try to correct the pivot point to the closest pivot of one of widgets.
if (overridePivotInParentSpace != null)
{
foreach (Widget widget in widgetsInParentSpace)
{
double length = ((Vector2d)widget.Position - overridePivotInParentSpace.Value).Length;
if (length <= 1e-3)
{
overridePivotInParentSpace = (Vector2d)widget.Position;
break;
}
}
}
Matrix32d originalObbToParentSpace;
if (!obbInFirstWidgetSpace)
{
originalObbToParentSpace =
Matrix32d.Translation(overridePivotInParentSpace ?? (Vector2d)widgetsInParentSpace[0].Position);
}
else
{
Widget widgetFirst = widgetsInParentSpace[0];
WidgetZeroScalePreserver zeroScalePreserver = new WidgetZeroScalePreserver(widgetFirst);
zeroScalePreserver.Store();
// Nullify Pivot and Scale, to simplify transformation matrix from M = mT' * mR * mS * mT, to M = mR * mT,
// to be able to use it with complex transformation by user (U = uT' uR * uS * uT), as
// dM = U * M, instead of we must make dM = mT' * uR * mR * uS * mS * uT * mT,
// and now if mT' = 1 and mS = 1 and uT = 1 it is reduced to dM = uT' * uS * uR * mR * mT = U * M.
Matrix32d firstWidgetToParentSpace;
Vector2 savedPivot = widgetFirst.Pivot;
Vector2 savedScale = widgetFirst.Scale;
widgetFirst.Pivot = Vector2.Zero;
widgetFirst.Scale = Vector2.One;
try {
firstWidgetToParentSpace = widgetFirst.CalcLocalToParentTransformDouble();
if (overridePivotInParentSpace != null)
{
firstWidgetToParentSpace.T = overridePivotInParentSpace.Value;
}
} finally {
widgetFirst.Pivot = savedPivot;
widgetFirst.Scale = savedScale;
zeroScalePreserver.Restore();
}
originalObbToParentSpace = firstWidgetToParentSpace;
}
ApplyTransformationToWidgetsGroupObb(
widgetsInParentSpace, originalObbToParentSpace,
currentMousePosInParentSpace, previousMousePosInParentSpace,
convertScaleToSize, onCalculateTransformation);
}
public static void ApplyTransformationToWidgetsGroupObb(IEnumerable <Widget> widgetsInParentSpace,
Matrix32d obbInParentSpace, Vector2d currentMousePosInParentSpace, Vector2d previousMousePosInParentSpace,
bool convertScaleToSize, CalculateTransformationDelegate onCalculateTransformation)
{
if (Math.Abs(obbInParentSpace.CalcDeterminant()) < Mathf.ZeroTolerance)
{
return;
}
Matrix32d transformationFromParentToObb = obbInParentSpace.CalcInversed();
Vector2d controlPointInObbSpace = previousMousePosInParentSpace * transformationFromParentToObb;
Vector2d targetPointInObbSpace = currentMousePosInParentSpace * transformationFromParentToObb;
Vector2d originalVectorInObbSpace = controlPointInObbSpace;
Vector2d deformedVectorInObbSpace = targetPointInObbSpace;
Transform2d obbTransformation = onCalculateTransformation(
originalVectorInObbSpace, deformedVectorInObbSpace
);
ApplyTransformationToWidgetsGroupObb(
widgetsInParentSpace, obbInParentSpace, obbTransformation, convertScaleToSize
);
}
